<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
      <div class="title-container">
        <h3 class="title">物流管理系统</h3>
      </div>
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="用户名"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>
      <el-form-item prop="imgText">
        <el-input
          v-model="loginForm.imgText"
          placeholder="验证码"
          name="imgText"
          type="text"
          tabindex="3"
        />
        <img :src="captchaSrc" @click="getCode" alt="验证码" />
      </el-form-item>
      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>
      <el-alert v-if="errorMessage" :title="errorMessage" type="error" show-icon />
    </el-form>
  </div>
</template>

<script>
import request from '@/utils/request' // 导入axios实例
import { validUsername } from '@/utils/validate'

export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('用户名必须填写'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 5) {
        callback(new Error('密码至少需要5位长度'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: '',
        imgText: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      captchaSrc: '', // 初始化 captchaSrc
      errorMessage: ''
    }
  },
  created() {
    this.getCode();
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          request.post('/auth/login', this.loginForm)
            .then(response => {
              if (response.data.code === 200) {
                this.$router.push('/')
              } else {
                this.errorMessage = response.data.message
              }
              this.loading = false
            })
            .catch(error => {
              this.errorMessage = error.response ? error.response.data.message : '登录失败'
              this.loading = false
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    async getCode() {
      try {
        console.log('Calling getCode method'); // 添加调试日志
        const response = await request.get('/auth/getCode');
        console.log('Captcha response:', response); // 添加调试日志

        if (response.code === 0) {
          // 如果 response.data 中包含 data:image/png;base64, 前缀，去掉重复前缀
          let base64ImageData = response.data;
          const prefix = 'data:image/png;base64,';
          if (base64ImageData.startsWith(prefix)) {
            base64ImageData = base64ImageData.substring(prefix.length);
          }
          this.captchaSrc = `${prefix}${base64ImageData}`;
          console.log('Captcha source:', this.captchaSrc); // 添加调试日志
        } else {
          console.error('获取验证码失败:', response.msg);
        }
      } catch (error) {
        console.error('获取验证码失败:', error); // 添加调试日志
      }
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
